This is the 4956th most frequent Japanese word.
移住
"移住" means "migration" or "relocation."
In this sentence, '移住' refers to moving from one location to another as a decision made, emphasizing the action of relocating.
彼は東京への移住を決断した。
He decided to move to Tokyo.
Here, '移住' is used to describe the action in the past—relocating—and its consequence, highlighting the transformation due to the move.
移住してから、彼の人生は大きく変わった。
Since relocating, his life has changed significantly.
In this example, '移住' denotes the concept of relocation being encouraged or handled on a societal level, focusing on its promotion through official measures.